I’ve written about PhotoPeer, a peer-to-peer photo sharing app, before, but this is a whole new ballgame: AOL’s next version of their instant messenger client will include picture-sharing features. That’s an interesting way to approach the main challenge that I saw with a pure peer-to-peer approach, which is how to build a compelling network of participants that’s larger than your immediate friends and family. The AIM approach avoids that problem by piggybacking photo sharing as a feature on top of an existing social network.